I am getting compile errors when trying to include a software UART in my project. The errors I'm getting are:

lib/gen_SerialServoDriver_uart.c: In function '__vector_14':error: 'PB0' undeclared (first use in this function)...and so on all relating to uses of PB0.

I have tried many other pins but I get the same compile error (but the pin changes).I have been able to successfully compile using the pins that didn't work in other project device (eg: PB0 on another device as a digital output).

Any ideas guys? Can anyone confirm for me if they are able to use software UART in their project?